Nfa A378 over Elk River
GoodGrundy County, Tennessee · 3.5 M North of Mounteagle · Structure no. 310A3780001
- Built
- 1989
- 36 years old
- Condition
- Good
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 131 ft
- 3 main spans
- Daily traffic
- 150
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
Nfa A378 over Elk River is a prestressed concrete continuous stringer/multi-beam or girder carrying Nfa A378 over Elk River in Grundy County, Tennessee. It was built in 1989, so it is 36 years old, younger than the Tennessee average of 47.4 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 150 vehicles a day, roughly 2% of them trucks, projected to reach 240 by 2040. The structure is 131 ft (39.9 m) long and 24 ft wide. If it were closed, the detour would be 9.9 mi (16 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Nfa A378 over Elk River built?
It was built in 1989, making it 36 years old in 2025.
What condition is Nfa A378 over Elk River in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.
How much traffic does Nfa A378 over Elk River carry?
About 150 vehicles per day (2020 count), of which roughly 2% are trucks.
How long is Nfa A378 over Elk River?
The structure is 131 ft (39.9 m) long with a longest span of 46 ft (14 m) and a deck 24 ft wide.
Who owns Nfa A378 over Elk River?
It is owned by the County Highway Agency.